Korloy TCMT16T304-C25 PC9030 Stainless Steel Turning Insert (10pcs)
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The Original Korloy TCMT16T304-C25 PC9030 is a high-performance Triangular Indexable Insert specifically designed for the demanding requirements of Stainless Steel (M-Group) and High-Temperature Alloys. Built on the legendary PC9030 PVD Grade, this insert offers exceptional resistance to thermal shock and built-up edge. The C25 Chipbreaker is engineered for medium-to-heavy finishing, providing stable chip control even in materials known for long, bird-nesting chips.
The Heavy-Duty Stainless Specialist: The 16T3 size provides the mechanical strength needed for larger diameter boring and external turning. PC9030's specialized PVD coating acts as a thermal barrier, making it the most reliable choice for continuous production in 300-series stainless steels.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Designation | TCMT16T304-C25 |
| Corner Radius (r) | 0.4 mm (Precision Finishing) |
| Grade | PC9030 (Premium PVD for Stainless) |
| Thickness | 3.97 mm |
Core Performance Benefits:
- Optimized for M-Class Materials: Specifically tuned for the chemistry of stainless steels, preventing the chemical wear common with universal grades.
- C25 Geometry: A versatile chipbreaker that excels in a wide range of depths, ensuring safety for the operator and the workpiece.
- Anti-Adhesion Coating: The ultra-smooth PVD surface minimizes friction, significantly reducing the occurrence of Built-Up Edge (BUE).
- Large Edge Security: The 16mm side length offers more thermal mass and stability for larger industrial components.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Stainless Steel (304 / 316) | 90 - 190 m/min | 0.08 - 0.22 mm/rev | 0.5 - 2.5 mm |
| Duplex Stainless | 60 - 130 m/min | 0.10 - 0.20 mm/rev | 0.5 - 2.0 mm |
| High-Temp Alloys | 30 - 70 m/min | 0.08 - 0.15 mm/rev | 0.3 - 1.5 mm |
Compatible Tooling Holders:
Pairs perfectly with large triangular tool systems:
- Internal Boring Bars: S20R-STUCR16 / S25S-STUCR16 / S32T-STUCR16
- External Turning Tools: STGCR 2020K16 / STGCR 2525M16
Machinist Tip: Taming Large Stainless Parts
Why PC9030 is the professional's choice for TCMT16:
Unmatched Stability. While CVD grades like NC6215 are faster, they often chip in small-to-medium stainless operations. PC9030 (PVD) offers the toughness needed for "real-world" stainless machining where coolant and rigidity aren't always perfect.
Mass Production Speed. Only switch to NC6215 if you have a highly rigid setup and are running high-speed continuous cuts in stable steel/stainless environments to maximize productivity.
Pro Advice: For large diameter boring with TCMT16, ensure your boring bar is as short as possible. If vibration occurs with the 0.4 radius, check your feed rate—stainless often requires a slightly higher feed to break the chip properly against the C25 geometry.
Packaging: 10 pieces per box.
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Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.